Boo, of course. It's not about being classy or unclassy. Basic principles of psychology y'all - reinforcement. Would any of you positively reinforce your children, friends, etc. for making a huge error in judgement which costs a large group of people emotional / mental anguish? Of course not. On the other hand, the booing should not be based on pure hatred and vengeance. When he catches his first TD pass, I will appropriately cheer him and positively reinforce him. Regarding those who say that he has suffered enough...perhaps. When Josh Morgan went down, I was extremely moved by his open letter to the 49ers Faithful. It seemed as though he even blamed himself for the injury, letting the team down, and he promised the 49ers fanbase to come back stronger, better, and hungrier. Well-done and appreciated. I would've expected that as a bare minimum from Kyle Williams for his Bill Buckner-esque actions.